May weather forecastFountain Valley, CA
May
Weather in May
The last month of the spring, May, is an agreeable month in Fountain Valley, California, with an average temperature fluctuating between 68.7°F (20.4°C) and 56.8°F (13.8°C).Temperature
With the onset of May, Fountain Valley's average high-temperature clocks in at a pleasant 68.7°F (20.4°C), showing a minor fluctuation from the previous month. Fountain Valley, during the nights of May, experiences an average temperature drop to a refreshing 56.8°F (13.8°C).Humidity
In May, the average relative humidity in Fountain Valley is 69%.Rainfall
In Fountain Valley, in May, during 4.7 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. In Fountain Valley, during the entire year, the rain falls for 59.1 days and collects up to 8.86" (225mm) of precipitation.Daylight
The average length of the day in May is 13h and 55min.On the first day of May, sunrise is at 6:02 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 7:56 pm PDT.
Sunshine
In Fountain Valley, the average sunshine in May is 11.1h.UV index
In Fountain Valley, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In May, a daily UV index of 5 turns into the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Fountain Valley, CA
- Average high temperature in May: 68.7°F
The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is December (62.6°F).
- Average low temperature in May: 56.8°F
The month with the highest average low temperature is August (65.1°F).
The coldest month (with the lowest average low temperature) is February (51.8°F).
Average pressure in May
Fountain Valley, CA
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed in May
Fountain Valley, CA
- Average wind speed in May: 6.3mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest months (with the lowest average wind speed) are September and October (5.2mph).
Average humidity in May
Fountain Valley, CA
- Average humidity in May: 69%
The month with the highest relative humidity is June (72%).
The month with the lowest relative humidity is November (56%).
Average rainfall in May
Fountain Valley, CA
- Average rainfall in May: 0.28"
The wettest month (with the highest rainfall) is December (1.81").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in May
Fountain Valley, CA
- Average rainfall days in May: 4.7 days
The month with the highest number of rainy days is March (7.9 days).
The month with the least rainy days is August (2.1 days).
Average daylight in May /
Average sunshine in May
Fountain Valley, CA
- Average daylight in May: 13h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in May: 11h and 6min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in May
Fountain Valley, CA
- Average sunshine days in May: 22.8 days
The month with the most sunshine days is August (26.8 days).
The month with the least sunshine days is February (20 days).
Average UV index in May
Fountain Valley, CA
- Average UV index in May: 5
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in May
Fountain Valley, CA
- Average cloud cover in May: 19
The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in May
Fountain Valley, CA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
